In the United Kingdom comprehensives are secondary schools (high schools) which are paid for by the government, unlike independent schools (private schools) and have no power to select their students based on academic ability, unlike grammar schools.
After five years of being taught little else most of their pupils are evidently unable to use a condom correctly.

Left-wing people generally believe that pupils of different abilities should be taught in the same schools(!). They closed down almost all of the grammar schools with the aim of providing 'equal opportunities' - condemning intelligent children from poor families to seven years of hell before finally getting to university.
About 90% of British schoolchildren now attend comprehensives.

A training ground for the next generation of drug-dealers and prostitutes.

Teacher: I'd expect that kind of debauchery at the comprehensive down the road, but not here at The College! *

Teacher: Can we stop acting like a bunch of retards from the local comprehensive and get on with the work! *

* laughs all round, we all that know our teacher went to a comprehensive himself